import type { Application, Request } from 'express';
import { type Options } from 'express-rate-limit';
export type TrustProxySetting = number | string | string[] | ((ip: string, hop: number) => boolean);
export declare function rateLimitOptions(defaults: {
    windowMs: number;
    limit: number;
}, overrides?: Partial<Options>): Partial<Options>;
export declare function authenticatedIdentityKey(req: Request): string;
export declare function configureTrustProxy(app: Application, setting: TrustProxySetting | undefined): void;
//# sourceMappingURL=RateLimitPolicy.d.ts.map